28/04/2022
The show season + warmer weather combo results, amongst other things, in a lot of traveling horses and most horse owners know that a negative Coggins test is a document required to be able to transport their animals across state lines and enter them in a competitive event (or even board at someone's barn).
But if you’re thinking, “My horse doesn’t travel, does it still need an annual Coggins test?” — the answer is: YES.
A "Coggins" is a blood test that can only be performed by USDA-approved laboratories and checks for Equine Infectious Anemia (EIA) antibodies in the horse's blood. EIA is a potentially fatal blood-borne infectious viral disease that produces a persistent infection — which means that infected horses become lifelong carriers, as there is no vaccine and no treatment.
EIA is transmitted by biting flies, particularly horseflies, so your horse is at risk even it never travels or lives in a closed herd. If a horse becomes infected, the clinical signs of disease can vary dramatically, from an acute infection with slight to high fever for a few days and perhaps small hemorrhages, to progressive weakness, weight loss, depression, and disorientation. EIA also has an inapparent form; affected horses might only show a slight fever for a day or be totally without clinical signs of the infection.
If a horse tests positive for EIA, they will serve as a lifelong source of disease transmission to other equids; at that point the owner can only choose between quarantine and isolation for the rest of the horse's life (minimum 200 yards away from all other horses), or humane euthanasia.
Take-home message: a Coggins test is a necessary travel document, but it's also first and foremost a way to identify and remove EIA carriers to ensure that large outbreaks of the disease don't take place.
To learn more about EIA, visit our website at https://aaep.org/horsehealth/equine-infectious-anemia